Satisfactory commutation of D.C. machines requires______________? – McqOptions

MCQOPTIONS

1.	Satisfactory commutation of D.C. machines requires______________?
A.	brushes should be of proper grade and size
B.	brushes should smoothly run in the holders
C.	smooth, concentric commutator properly undercut
D.	all of the above
Answer» E.

Discussion

No Comment Found

Related MCQs

While applying Fleming’s right-hand rule to And the direction of induced e.m.f., the thumb points towards___________?
Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?
Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?
Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?
When two D.C. series generators are running in parallel, an equilizer bar is used________________?
When two D.C. generators are running in parallel an equilizer bar is used______________?
Welding generator will have____________?
Wave winding is composed of_______________?
Two generators are running in parallel. One of the generators may run as motor for which of the following reasons ?
Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?